*{
    margin: 0;
    padding: 0;
}
ul{
    list-style: none;
}
html,body,#root{
    height: 100%;
}
.app{
    height: 100%;
}
.tabbar{
    background-color: aqua; 
}
.center{
    height: calc(100% - 42px);
}
.navbar{
    background-color: aqua;
}
.tabbar ul ,.navbar ul{
    display: flex;
    justify-content: space-between;
}
.active{
    color: red;
}